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MIC38HC43

BiCMOS 1A Current-Mode PWM Controller

Status: In Production

Features:

  • Fast 20ns output rise and 15ns output fall times
  • -40°C to +85°C temperature range exceeds UC284x specifications
  • High-performance, low-power BiCMOS Process
  • Ultra-low start-up current (50µA typical)
  • Low operating current (4mA typical)
  • High output drive (1A peak current, HC version)
  • CMOS outputs with rail-to-rail swing
  • Current-mode operation up to 500kHz
  • Trimmed 5V bandgap reference
  • Pin-for-pin compatible with UC3842/3843/3844/3845(A)
  • Trimmed oscillator discharge current
  • UVLO with hysteresis
  • Low cross-conduction currents
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC38HC4x family are fixed frequency current-mode PWM controllers with 1A drive current capability. BiCMOS devices are pin-compatible with 384x bipolar devices. Their high output drive, with fast rise and fall times, combined with low startup current make it an ideal PWM controller where high efficiency is required. Undervoltage lockout circuitry allows the '42 and '44 versions to start up at 14.5V and operate down to 9V, and the '43 and '45 versions start at 8.4V with operation down to 7.6V. All versions operate up to 20V. When compared to bipolar UC384x devices operating from a 15V supply, start-up current has been reduced to 50µA typical and operating current has been reduced to 4.0 mA typical. Decreased output rise and fall times drive larger MOSFETs, and rail-to-rail output capability increases efficiency, especially at lower supply voltages. The MIC38HC4x also features a trimmed oscillator discharge current and bandgap reference. MIC38HC4x-1 is available in 14-pin plastic DIP and SOIC packages. 8-pin devices feature small size, while 14-pin devices separate the analog and power connections for improved performance and power dissipation.

Additional Features
    • Fast 20ns output rise and 15ns output fall times
    • -40°C to +85°C temperature range exceeds UC284x specifications
    • High-performance, low-power BiCMOS Process
    • Ultra-low start-up current (50µA typical)
    • Low operating current (4mA typical)
    • High output drive (1A peak current, HC version)
    • CMOS outputs with rail-to-rail swing
    • Current-mode operation up to 500kHz
    • Trimmed 5V bandgap reference
    • Pin-for-pin compatible with UC3842/3843/3844/3845(A)
    • Trimmed oscillator discharge current
    • UVLO with hysteresis
    • Low cross-conduction currents
Parametrics
Name
Value
Supported Topologies
Forward,Flyback
Supported Outputs
1
Minimum Input Voltage (V)
7.6
Maximum Input Voltage (V)
20
Typical Tolerance (%)
±2
Duty Cycle Max (%)
0.96
Operating Frequency (Hz)
Adj. to 500kHz
Internal Voltage Bias
True
Input UVLO Typ (V)
8.4
Operating Supply Current (mA)
4
Package
8/PDIP, 8/SOIC, 14/PDIP, 14/SOIC

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC38HC43YM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38HC43YM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC38HC43-1YM
0.143200
0.280702
14
SOIC
.150In(3.90mm)
Matte Tin
e3
MIC38HC43-1YM-TR
0.143200
0.325000
14
SOIC
.150In(3.90mm)
Matte Tin
e3
MIC38HC43-1YN
0.953300
1.833333
14
PDIP
.300in
Matte Tin
e3
MIC38HC43YN
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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